星系团最亮团星系(BCG)和星系团内光(ICL)在z=0.1-0.8之间的结构和质量演化

星系团中心最亮团星系（BCG）和星系团内光（ICL）是研究星系演化和星系团演化的重要探针，一直是此领域中的重点研究对象。尤其是其结构、质量和环境在z<1阶段的变化蕴含了丰富的演化历史，为理解演化机制和限制理论模型提供关键的观测证据。本项目拟从Hyper Suprime-Cam Subaru Strategic Program (HSC-SSP)的星系团列表中选取z=0.1-0.8之间210个具有演化关联的BCG+ICL，利用HSC-SSP于2019年8月最新公布的多波段测光图像，测量BCG+ICL结构和恒星质量等性质，并对其周围的并合现象进行量化分析。通过本项目，预期得到z=0.1-0.8之间BCG+ICL结构和质量的观测数据，确定及限制BCG+ICL演化的理论模型，揭示并合在演化中的作用。本项目为利用未来大视场高深度巡天数据（如中国空间站望远镜光学巡天）研究星系团中心星系演化提供基础。

The brightest cluster galaxies (BCGs) are the most luminous and massive galaxies in the universe locating in the centre of galaxy clusters. Intracluster light (ICL) is a diffuse and low surface brightness stellar component, pervading in the cluster core region and intertwining with the properties of BCGs. The special regions BCG+ICL reside make their properties and evolution being intimately linked with the environments of the host clusters. Therefore, studying on BCG+ICL assembly, especially on their structure and stellar mass evolution at z<1, is essential for clarifying our understanding on both galaxy growth and cluster history. By employing the latest multi-band deep photometric images from the Hyper Suprime-Cam Subaru Strategic Program (HSC-SSP), my proposed research aims to measure structures and stellar masses of 210 BCG+ICL during z=0.1-0.8, as well as to quantify merging signals around them. This project will constrain the growth of BCG+ICL since z~0.8, and will probe what is the role of merger in driving BCG+ICL evolution, providing new insight into galaxy and cluster evolution in cluster core regions. This project will serve as a foundation for using the next generation photometric images from the future large and deep sky surveys, like CSST.